Calamosca M, Pagano P, Trenti F, Zaghini L, Gentile G, Tarroni G, Morandi L
ENEA-PAS-FIBI-Lab. Fisica e Tossicologia Aerosol-Bologna.
Dtsch Tierarztl Wochenschr. 1990 Nov;97(11):452-6.
The authors have analysed the relationship between 137Cs radioactivity and pregnancy in cattle with radiometric analysis of muscle, kidney and liver of 24 cattle at various stages of pregnancy, fed with fodder exposed to radioactive fall-out. Also the relative fetal muscle, kidney, liver and myocardium have been analysed. The automatic spectra analysis and the statistical one have given the following results: there is no correlation between 137Cs retention and the pregnancy stage in the cattle sampled; the absolute 137Cs concentration is always larger in the kidney than in the muscle (Km/Mm = 1.7), while it is just minor in minor in the liver (Lm/Mm = 0.8). The fetal concentration in muscle, kidney and liver is generally homogeneous, whereas the myocardium tends to retain more 137Cs in the first stages of the pregnancy as against the other tissues. In the last stage of pregnancy it presents a lower concentration. The authors have included the fetal body weight growth to get a more realistic description of the 137Cs transfer in the mother-fetus system; this approach enables to evaluate the kinetic constants so introduced.
作者通过对24头处于不同孕期阶段、食用受放射性沉降物污染饲料的母牛的肌肉、肾脏和肝脏进行放射性分析，研究了137Cs放射性与母牛妊娠之间的关系。同时，还对胎儿的肌肉、肾脏、肝脏和心肌进行了分析。自动光谱分析和统计分析得出了以下结果：在所采样的母牛中，137Cs的蓄积与妊娠阶段之间没有相关性；肾脏中137Cs的绝对浓度始终高于肌肉（肾脏/肌肉=1.7），而肝脏中的浓度则略低于肌肉（肝脏/肌肉=0.8）。胎儿肌肉、肾脏和肝脏中的浓度通常较为均匀，而在妊娠初期，心肌相对于其他组织往往会蓄积更多的137Cs。在妊娠后期，心肌中的浓度较低。作者纳入了胎儿体重增长情况，以便更真实地描述137Cs在母胎系统中的转移；这种方法能够评估由此引入的动力学常数。
